Well that's strange because Corendon are owned by a Dutch tour operator and unless things have changed they operate to/from most if not all of the Dutch airports and one or two in Belgium, perhaps Germany, also, if they were to start operations to/from UK then surely the obvious place(s) would be one of the mega cities and not a quaint seaside town ... unless this may be similar to Isle of Man charters ... once the hoteliers own season is over they all b'gger off on a holiday of their own.
BUT ... Corendon change their schedules at the drop of a hat, not even their own crews clearly understand where they may be going to and at what time the next day, travelling with them on business often I jumpseated AMS/AYT but I never actually made it back to AMS, despite my best attempts every time I ended up back in RTM, sometimes via Groningen, and needed to hire car it RTM/AMS